Mazda CX-9 Grand Touring. Manual - part 275

1

VERIFY FREEZE FRAME DATA 
HAS BEEN RECORDED  



Has FREEZE FRAME DATA been 
recorded?  

Yes Go to the next step.

No

Record the FREEZE FRAME DATA on the repair 

order, then go to the next step.

2

VERIFY REPAIR INFORMATION 
AVAILABILITY  



Verify related Service Bulletins 
availability.  



Is any related Service Bulletins 
available?  

Yes

Perform repair or diagnosis according to the 
available Service Bulletins. If the vehicle is not 
repaired, go to the next step.

No

Go to the next step.

3

VERIFY RELATED PENDING CODE 
OR STORED DTCs  



Turn the ignition switch off then to 
the ON position (Engine off).  



Verify related pending code or 
stored DTCs.  



Is other DTCs present?  

Yes

Go to the appropriate DTC troubleshooting. (See 
DTC TABLE [MZI-3.7].)

No

Go to the next step.

4

VERIFY STORED DTC IN 
INSTRUMENT CLUSTER  



Turn the ignition switch off then to 
the ON position (Engine off).  



Verify stored DTCs in instrument 
cluster.  



Is other DTCs present?  

Yes

Go to the appropriate DTC inspection. (See DTC 
TABLE [INSTRUMENT CLUSTER] .)

No

Go to the next step.

5

VERIFY TROUBLESHOOTING OF 
DTC P0463 HAS BEEN COMPLETED 



Verify that all disconnected 
connectors reconnected.  



Clear the DTC from the PCM 
memory using the M-MDS.  



Perform the "KOEO/KOER self-
test". (See KOEO/KOER SELF 
TEST [MZI-3.7].)  



Is the PENDING CODE for the 
DTC present?  

Yes

Replace the PCM, then go to the next step. (See 
PCM REMOVAL/INSTALLATION [MZI-
3.7] .)

No

Go to the next step.

VERIFY AFTER REPAIR 
PROCEDURE  



Perform the "AFTER REPAIR 

Yes

Go to the applicable DTC inspection. (See DTC 
TABLE [MZI-3.7].)

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 233 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0480 [MZI-3.7] 

DTC P0480 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

6

PROCEDURE". (See AFTER 
REPAIR PROCEDURE [MZI-
3.7].)  



Are any DTCs present?  

No

Troubleshooting completed.

DTC P0480

Fan control circuit

DETECTION 

CONDITION 



This test inspect the fan control circuit. The DTC sets if the PCM detects the 
voltage on the fan control variable circuit is not within the expected range.  

POSSIBLE CAUSE 



Connector or terminal malfunction  



Fan control module malfunction 

Dual fan control module  



Open circuit between fan control module No.1 terminal 1B and PCM 
terminal 1AM  



Short to power supply between fan control module No.1 terminal 1B and 
PCM terminal 1AM  



Short to ground circuit between fan control module No.1 terminal 1B and 
PCM terminal 1AM  



Open circuit between fan control module No.2 terminal B and PCM 
terminal 1AM  



Short to power supply between fan control module No.2 terminal B and 
PCM terminal 1AM  



Short to ground circuit between fan control module No.2 terminal B and 
PCM terminal 1AM  



Open circuit between fan control module No.1 terminal 1A and cooling fan 
relay No.1 terminal E  



Open circuit between fan control module No.1 terminal 1C and body ground



Open circuit between fan control module No.2 terminal A and cooling fan 
relay No.2 terminal E  



Open circuit between fan control module No.2 terminal C and body ground 

Single fan control module  



Open circuit between fan control module terminal 1B and PCM terminal 1 
AM  



Short to power supply between fan control module terminal 1B and PCM 
terminal 1AM  



Short to ground circuit between fan control module terminal 1B and PCM 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 234 

© 2005 Mitchell Repair Information Company, LLC. 

terminal 1AM  



Open circuit between fan control module terminal 1C and cooling fan relay 
terminal E  



Open circuit between fan control module terminal 1A and body ground  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 235 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P0480 (MZI-3.7) DIAGNOSTIC PROCEDURE 

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS 
BEEN RECORDED  



Has FREEZE FRAME DATA been 
recorded?  

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair 

order, then go to the next step.

2

VERIFY RELATED REPAIR 
INFORMATION AVAILABILITY  



Verify related Service Bulletins and/or 
on-line repair information availability.  



Is any related Service Bulletins 
available?  

Yes

Perform repair or diagnosis according to the 
available Service Bulletins. 



If the vehicle is not repaired, go to the 
next step.  

No

Go to the next step.

3

INSPECT FAN CONTROL MODULE 
CONNECTOR FOR POOR 
CONNECTION  



Turn the ignition switch off.  



Disconnect fan control module 
connector.  



Inspect for poor connection (such as 
damaged, pulled-out pins, corrosion, 
etc.).  



Are there any malfunction?  

Yes

Repair or replace suspected part, then go to 
Step 10.

No

Go to the next step.

INSPECT FAN CONTROL MODULE 
POWER SUPPLY CIRCUIT FOR OPEN 
CIRCUIT  



Turn the ignition switch to the ON 
position (Engine off).  



Measure voltage between the following 
circuits: 

Dual fan control module  

Yes Go to the next step.

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:38 AM

Page 236 

© 2005 Mitchell Repair Information Company, LLC.